News - The longest lasting alkaline battery

[Calina]

It comes from Panasonic and will be called the Evolta .

Panasonic promises its new battery cell will keep gadgets running 20 per cent longer than offerings from rivals Duracell and Energizer, as well as its own upscale Oxyride batteries.

Guinness certified Evolta in a Tokyo ceremony Tuesday as "the longest lasting AA alkaline battery cell.


Read about it here: http://technology.sympatico.msn.ca/...&showbyline=True&subtitle=&detect=&abc=abc&da

 

[LED_Thrift]

Interesting.
I wonder if they sometimes leak like regular alkalines?

 

[Burgess]

Thank you for the info, Calina. :thumbsup:


However, not to say that i am totally convinced, yet.


20% longer life, at 15% higher price (in Japan, anyway)


We shall see.

_

 

[nerdgineer]

...20% longer life, at 15% higher price (in Japan, anyway)


We shall see...

Agreed - and the standard for comparison is not the Eveready AAs at full list price, it is the 4 for $1 Panasonic/Sony/Varta alkalines at the 99 cent store which work pretty good for me. If I can't get the new ones for less than about 31 cents each, I'm not interested....:shrug:

 

[Calina]

I think the most interesting part of the news is that they managed to improve on a very mature technology.

I guess this should start a new round of research and development. on alkaline cells; this in itself is very good. It's too bad that more details are not available at this point in time.

 

[Burgess]

Six months ago, i posted this thread:


http://www.candlepowerforums.com/vb/showthread.php?t=169577&highlight=energizer



Never got a single response ! :mecry:


Why is this Panasonic alkaline more noteworthy ?


Cuz' it's been certified by Guiness ?



Just FYI.

_

 

[Jackson]

Six months ago, i posted this thread:

http://www.candlepowerforums.com/vb/showthread.php?t=169577&highlight=energizer

Never got a single response ! :mecry:

Why is this Panasonic alkaline more noteworthy ?

My guess would be because the Panasonic battery is making a measurable claim while the inclusion of "Improved" on the Energizer pack is easily dismissed as marketing drivel.

 

[Zenster]

Why is this Panasonic alkaline more noteworthy ?


Cuz' it's been certified by Guiness ?


Just FYI.
_

No.. because I read about it while drinking Guiness.

 

[Templar223]

Interesting.
I wonder if they sometimes leak like regular alkalines?

Prolly.

About 20% more often? Or just 20% longer? Or just 20% more corrosive goo?

I'm liking Li rechargeables more and more all the time.

John

 

[radellaf]

I've been going through anything of mine with alkalines and replacing them -- found some "use by 2003" ones which probably means they're over 10 years old.

Only one set had a leaker - a "use by 2007" AAA Titanium energizer. Contacts in that Emerson 3xAAA 3 LED light were gold plate though, so no dmg.

My 2xAA clock had one leak a good bit, but it was over-discharged (and no way for me to know).

Other than those, a relatively fresh pack of 24 RayOVac AAs started just leaking right in the package, at least a quarter of the cells. ROV said toss them and sent me replacements, which aren't leaking.

So, now I have a set of 4 2002s and 6 2008s. About full so I hate to toss, but don't trust them in anything I'm not going to use them up in relatively quickly... not much fits the bill. Usually I burn the rechargeables in flashlights that I'm using in rooms that _could_ be lit normally, and about all my audio stuff uses proprietary LiIon. I have a box to run the iPods off 4xAA, but unless you're on a plane or somesuch, there's not much point... shame, too, paid $60 for it in an airport and never needed it.

----

I was using a Mag Solitaire for nostalgia's sake for a while and tried lithium AAAs and duracell's oxy-alkaline. Both burnt out the bulb in a hurry. I wonder if these new alkalines will have the same 1.6V nominal as the oxys.

 

[notnormal]

Link
I can't help but think rEvolta when I see the name and packaging :devil:.

Nonetheless, it's a nice accomplishment by Panasonic; however, imo it's too little too late. For high drain devices, I prefer to use NiMH rechargeables. For general use, I prefer low self discharge rechargeables.

 

[Burgess]

to notnormal --


Yes !

That's the Same Thing that I thought of ! :devil:



Great minds think alike. :thumbsup:



They ARE pretty, however.


Remains to be seen how much they cost, relative to Energizer and Duracell.


We (in USA, anyway) seem to view Panasonics as a "bargain or value" brand.



Oh, and welcome to CandlePowerForums !

:welcome:
_

 

[notnormal]

Oh, and welcome to CandlePowerForums !

:welcome:
_

Thanks for the welcome! Now, if the Panasonic Evolta cost the same as Energizers and Duracells, they could have a winner.

 

[Codeman]

Battery-Powered Robot Climbs Rope for 7 Hours in Grand Canyon, Sets Guinness World Record

 

[Wattnot]

Great. Just what we need. An alkaline that dies and even SLOWER death. I don't suppose they improved the power curve while they were at it? I thought so.

I would take HALF the runtime if the thing would just put out close to 1.5 volts for it's lifespan.

I guess it will help out with low current draw devices like radios.

 

[MorePower]

Battery-Powered Robot Climbs Rope for 7 Hours in Grand Canyon, Sets Guinness World Record

Feel free to check my math, but that really isn't all that impressive.

t=6.75 hours, m=0.141 kg, h=530 meters, g = 9.8 m/s^2

Increase in potential energy of the robot = m*g*h = 733 Joules
733 J = 0.2036 Watt-hour = 203.6 mWh

Efficiency of an electric motor should be pretty good, but let's say it's only 60%. That would mean the energy required from the cells would be

203.6 mWh / 0.6 = 339.33 mWh

Assume the cells output (on average) 1.2 volts each, making 2.4 V in series.

Since 1 mWh = 1V * 1 mAh,

339.33 mWh / 2.4 V = 141.4 mAh and

141.4 mAh / 6.75 h = 20.95 mA draw from the cells

They could have used Zinc-Carbon cells and it would have worked...

 

[Codeman]

Feel free to check my math, but that really isn't all that impressive.

t=6.75 hours, m=0.141 kg, h=530 meters, g = 9.8 m/s^2

Increase in potential energy of the robot = m*g*h = 733 Joules
733 J = 0.2036 Watt-hour = 203.6 mWh

Efficiency of an electric motor should be pretty good, but let's say it's only 60%. That would mean the energy required from the cells would be

203.6 mWh / 0.6 = 339.33 mWh

Assume the cells output (on average) 1.2 volts each, making 2.4 V in series.

Since 1 mWh = 1V * 1 mAh,

339.33 mWh / 2.4 V = 141.4 mAh and

141.4 mAh / 6.75 h = 20.95 mA draw from the cells

They could have used Zinc-Carbon cells and it would have worked...

You might want to check your math:

60% of 203.6 mWh is 122.16, not 339.33 mWh.

For me, the fact that the Evolta surpassed all other tested batteries using IEC guidelines means these cells may be an improvment for some applications.

 

[jtr1962]

You might want to check your math:

60% of 203.6 mWh is 122.16, not 339.33 mWh.

For me, the fact that the Evolta surpassed all other tested batteries using IEC guidelines means these cells may be an improvment for some applications.

In this case you divide by 0.60, not multiply by 0.60. His math is correct. Since the motor is less than 100% efficient, power input is greater than power output. One thing he did wrong was assume 60% efficiency. In a small motor system with loads of losses in gearboxes, I'd say the overall mechanical energy conversion efficiency would be 10% if you're lucky, not 60%. Even if it were only 5%, then you get ~250 mA from the cells for 7 hours. Rechargeables were in that territory 5 or 6 years ago. All the test shows me is how badly alkalines stink for high-drain applications. They're fine in wall clocks or calculators but that's about it.

This new cell doesn't even register on my radar. It's yet another attempt by battery makers to sell overpriced, disposable cells for high-drain applications where rechargeables make more sense. 15% premium above regular ridiculous alkaline retail prices (I'm referring to the 4-packs for $3.99 in drug stores, not the 40 for $10 deals at Costco)? At that price you can keep them. They're another ripoff like the Oxyride cells. After Eneloops and other LSD cells I'm so done with alkaline anyway.

 

[Codeman]

Whoops - my mistake.

...They're fine in wall clocks or calculators but that's about it.

They're useful in a few more devices than that, which is exactly why I'm interested in these cells. I've got a Mag 6D light with 6 Duracell's in it, with an expiration date of 1994. Yet it's still putting out over 70% of full output. I rarely use it, obviously, but it's always there, ready to go. Even Eneloops couldn't pull that feat off after 14+ years. They would be dead.

I just don't see the need to knock a worthwhile product just because it doesn't fit every possible use.

 

[Frankiarmz]

I understand the hype with Guiness but do we need to keep dumping one time use batteries into our environment? How about improving rechargeables? Why can't we get a 3000MAH hybrid AA that holds a charge for several months? I bought into the NIMH AA and AAA's that discharge by the day and now I'm stocking up on the hybrid or "precharged" but the MAH's are not great. Why can't I get a true 1.5 volt rechargeable? What's with this 1.2 volt? I want more, I need more, I deserve more!